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Note 19 - Major Customers, Suppliers and Related Information (Tables)
6 Months Ended
Mar. 31, 2023
Notes Tables  
Schedule of Revenue from External Customers Attributed to Foreign Countries by Geographic Area [Table Text Block]
   

Three months ended March 31,

   

Six months ended March 31,

 
   

2023

   

2022

   

2023

   

2022

 

Americas

  $ 10,019     $ 10,095     $ 19,182     $ 19,531  

Asia Pacific

    545       2,147       1,304       2,455  

Europe, Middle East and Africa

    649       926       1,214       1,859  

Total Revenues

  $ 11,213     $ 13,168     $ 21,700     $ 23,845  
Long-Lived Assets by Geographic Areas [Table Text Block]
   

March 31,

   

September 30,

 
   

2023

   

2022

 

United States

  $ 10,724     $ 11,800  

Americas (excluding the United States)

    12       16  

Europe, Middle East and Africa

    451       446  

Total long lived assets

  $ 11,187     $ 12,262